Agent-based model predictive framework to control cell culture bioreactors

Bioprocesses require unique operational conditions and highly specialized process knowledge to obtain consistent product quality and productivity. Optimization and control of these processes are challenging due to the nonlinearities and uncertainties involved, and cell-bioreactor interactions are poorly understood. Automated control of bioreactors using model predictive control (MPC) technologies is less common as translating complex process specific interactions to linear models is challenging. Accurate models of the process are needed for MPC to succeed. Due to the complexity and heterogeneity involved in the culture environment, conventional mechanistic modeling efforts are often incomplete for describing the interactions of cell physiology and environmental conditions and predicting future behavior. Agent-based computational models provide a strong tool for studying mammalian cell culture bioreactor processes where agents (cells) take action based on changing dynamics of their immediate vicinity. An ABM was previously developed to simulate individual mammalian cell behavior and dynamics of bioreactor environment. In this study, applicability of MPC using ABM has been investigated to optimize growth in mammalian cell culture bioreactors

Development and validation of scale for self evaluation of soft skills in postgraduate dental students

Objective: To develop and validate a soft skills questionnaire, and to use it for self-evaluation by postgraduate dentistry students.Methods: The cross-sectional descriptive study was conducted at University College of Dentistry, , University of Lahore, Lahore, Pakistan, from February 2020 to April 2020 and comprised of residents from first to final year of training for either Masters in Dental Surgery or Fellowship of the College of Physicians and Surgeons Pakistan programmes. A soft skills questionnaire was generated and was validated through exploratory factor analysis of the elements and items of the questionnaire using SPSS 23.Results: Of the 60 subjects, 37(61.7%) were MDS residents and 23(38.3%) were Fellowship residents. The mean age of the sample was 29.650±2.815 years, and 26(43.3%) subjects were males. The questionnaire was validated (p\u3c0.001). Three domains measured the attitude of dentists, with 7 scenarios having 5 items per scenario. Both categories of trainees had high agreement in understanding and application of non-technical skills, with the exception of leadership skills. However, the difference between the groups was non-significant (p\u3e0.05).Conclusions: A self-generated questionnaire was successfully validated

The challenges in raising autistic children: The voices of mothers

Autism spectrum disorder (ASD) is defined as a lifetime developmental disorder usually identified by social interaction impairment, communication deficits, and repetitive behavior. The cases of children detected with ASD are rising globally, including Malaysia. Parents, as the prime caregiver to these children, face numerous challenges due to what is entailed in taking care of their children. This paper describes a case study where we examined the views and experience of three mothers, each of whom has an ASD child. Data were gathered through face-to-face semi-structured interviews, after which they were transcribed and analyzed using the thematic analysis method. The mothers narrated that the challenges they encountered include the difficulty they had in initially accepting their child’s diagnosis; labelling and discrimination; phase-based temporal challenges; endless physical, emotional, and mental sacrifices; finding the strength and patience to deal with the situation; academic vs. non-academic struggles, as well as their own coping mechanisms. This paper concludes with the need to provide support for parents-especially mothers-to enable them to overcome their challenges and focus on the development of their autistic children

Pemanfaatan Kriptografi dalam Mewujudkan Keamanan Informasi pada E-Voting di Kota Medan dengan Menggunakan Algoritma AES

Electronic “voting or e-voting is a form of voting that is usually used for elections or polls using electronic media. There is a shift in the use of media that used to be conventional and in the current technological era, there are many various media used for opinion polls, including social media/internet. In the next few years, through the USO (Universal Service Obligation) program, the government will provide voice and data communication access facilities to reach all villages in the country so that e-Voting is increasingly likely to be implemented. The E-Voting system is one way to help solve this problem. The security of the E-Voting system is guaranteed and in accordance with current technological developments. The system can be combined with various cryptographic algorithms to increase security, one of which is the AES cryptographic algorithm. Cryptography can be used to answer questions related to information security in the form of confidentiality,  non-denial, and authentication. In this journal, it will be explained how to use cryptography in realizing information security in e-Voting in Medan City Using the AES Algorithm Method”

Enhancing Children’s Learning Experience as a Sustainable Approach through Gamified Application Design

The COVID-19 pandemic altered how education was formerly conducted, with a rapid shift from face-to-face to online learning. This situation resulted in a significant lack of student-teacher interaction, which affected particularly lower grade students. However, the pandemic provided an opportunity to develop a more sustainable way of learning due to the increasing use of technologies. This research seeks to improve children’s online learning experience through application design in response to online learning conditions. To identify the problem, initial interviews with parents, guardians, and teachers were conducted. Afterward, individual in-depth interviews with primary school teachers were carried out to gain insights on the needs of both students and teachers during online learning. The final app design incorporates gamification elements for both target users. Students follow lessons through interactive narratives based on the standardized curriculum. Teachers can adjust lessons more independently and conveniently using the gamified customization features, such as customizing texts, characters, and media. The effectiveness of the app design was then determined through direct observations with target audiences. The findings show that the application design has the potential to revolutionize and promote sustainability in Indonesian primary school education

Infections in patients with multiple myeloma treated with conventional chemotherapy: A single-center, 10-year experience in Pakistan

Introduction: Multiple myeloma (MM) is a common hematologic malignancy with variable degrees of immunodeficiency. Disease- and treatment-related compromise of the immune system predisposes patients to infections, which are a major cause of morbidity and mortality.Objective: We aimed to establish the incidence and main characteristics of infections in MM patients treated at our center over a 10-year period.Method and results: Of the 412 patients retrospectively analyzed, 154 (37.4%) were documented to have at least one episode of infection and were included in this study. A total of 244 infectious episodes were documented. The most common site of infection was the lung, followed by the genitourinary system. The most common infections were bacterial, followed by viral. Escherichia coli were the most common organism. In 160 (65.5%) episodes, the organism was not isolated. Thalidomide with dexamethasone was the most common treatment regimen, followed by melphalan with dexamethasone. Infection was the main cause of death in 26 (6.3%) out of all 412 patients.Conclusion: Infections are a notable cause of morbidity and mortality in the clinical course of MM patients. By considering patient and disease characteristics, a risk-adapted selection of the MM treatment should be employed, with special attention toward patient age and disease-associated organ dysfunction. Patient education, access to healthcare and physician vigilance are also essential. Vaccination and antimicrobial prophylaxis may be considered prior to or during therapy

Evaluating the Effects of SARS-CoV-2 Spike Mutation D614G on Transmissibility and Pathogenicity.

Global dispersal and increasing frequency of the SARS-CoV-2 spike protein variant D614G are suggestive of a selective advantage but may also be due to a random founder effect. We investigate the hypothesis for positive selection of spike D614G in the United Kingdom using more than 25,000 whole genome SARS-CoV-2 sequences. Despite the availability of a large dataset, well represented by both spike 614 variants, not all approaches showed a conclusive signal of positive selection. Population genetic analysis indicates that 614G increases in frequency relative to 614D in a manner consistent with a selective advantage. We do not find any indication that patients infected with the spike 614G variant have higher COVID-19 mortality or clinical severity, but 614G is associated with higher viral load and younger age of patients. Significant differences in growth and size of 614G phylogenetic clusters indicate a need for continued study of this variant

Hyperoxemia and excess oxygen use in early acute respiratory distress syndrome : Insights from the LUNG SAFE study

Publisher Copyright: © 2020 The Author(s). Copyright: Copyright 2020 Elsevier B.V., All rights reserved.Background: Concerns exist regarding the prevalence and impact of unnecessary oxygen use in patients with acute respiratory distress syndrome (ARDS). We examined this issue in patients with ARDS enrolled in the Large observational study to UNderstand the Global impact of Severe Acute respiratory FailurE (LUNG SAFE) study. Methods: In this secondary analysis of the LUNG SAFE study, we wished to determine the prevalence and the outcomes associated with hyperoxemia on day 1, sustained hyperoxemia, and excessive oxygen use in patients with early ARDS. Patients who fulfilled criteria of ARDS on day 1 and day 2 of acute hypoxemic respiratory failure were categorized based on the presence of hyperoxemia (PaO2 > 100 mmHg) on day 1, sustained (i.e., present on day 1 and day 2) hyperoxemia, or excessive oxygen use (FIO2 ≥ 0.60 during hyperoxemia). Results: Of 2005 patients that met the inclusion criteria, 131 (6.5%) were hypoxemic (PaO2 < 55 mmHg), 607 (30%) had hyperoxemia on day 1, and 250 (12%) had sustained hyperoxemia. Excess FIO2 use occurred in 400 (66%) out of 607 patients with hyperoxemia. Excess FIO2 use decreased from day 1 to day 2 of ARDS, with most hyperoxemic patients on day 2 receiving relatively low FIO2. Multivariate analyses found no independent relationship between day 1 hyperoxemia, sustained hyperoxemia, or excess FIO2 use and adverse clinical outcomes. Mortality was 42% in patients with excess FIO2 use, compared to 39% in a propensity-matched sample of normoxemic (PaO2 55-100 mmHg) patients (P = 0.47). Conclusions: Hyperoxemia and excess oxygen use are both prevalent in early ARDS but are most often non-sustained. No relationship was found between hyperoxemia or excessive oxygen use and patient outcome in this cohort. Trial registration: LUNG-SAFE is registered with ClinicalTrials.gov, NCT02010073publishersversionPeer reviewe

Exponential growth, high prevalence of SARS-CoV-2, and vaccine effectiveness associated with the Delta variant

SARS-CoV-2 infections were rising during early summer 2021 in many countries associated with the Delta variant. We assessed RT-PCR swab-positivity in the REal-time Assessment of Community Transmission-1 (REACT-1) study in England. We observed sustained exponential growth with average doubling time (June-July 2021) of 25 days driven by complete replacement of Alpha variant by Delta, and by high prevalence at younger less-vaccinated ages. Unvaccinated people were three times more likely than double-vaccinated people to test positive. However, after adjusting for age and other variables, vaccine effectiveness for double-vaccinated people was estimated at between ~50% and ~60% during this period in England. Increased social mixing in the presence of Delta had the potential to generate sustained growth in infections, even at high levels of vaccination

Genomic epidemiology of SARS-CoV-2 in a UK university identifies dynamics of transmission

AbstractUnderstanding SARS-CoV-2 transmission in higher education settings is important to limit spread between students, and into at-risk populations. In this study, we sequenced 482 SARS-CoV-2 isolates from the University of Cambridge from 5 October to 6 December 2020. We perform a detailed phylogenetic comparison with 972 isolates from the surrounding community, complemented with epidemiological and contact tracing data, to determine transmission dynamics. We observe limited viral introductions into the university; the majority of student cases were linked to a single genetic cluster, likely following social gatherings at a venue outside the university. We identify considerable onward transmission associated with student accommodation and courses; this was effectively contained using local infection control measures and following a national lockdown. Transmission clusters were largely segregated within the university or the community. Our study highlights key determinants of SARS-CoV-2 transmission and effective interventions in a higher education setting that will inform public health policy during pandemics.</jats:p